BUG #4566: pg_stop_backup() reports incorrect STOP WAL LOCATION

The following bug has been logged online:

Bug reference: 4566
Logged by: Randy Isbell
Email address: jisbell(at)cisco(dot)com
PostgreSQL version: 8.3.4
Operating system: FreeBSD 6.2
Description: pg_stop_backup() reports incorrect STOP WAL LOCATION
Details:

An inconsistency exists between the segment name reported by
pg_stop_backup() and the actual WAL file name.

SELECT pg_start_backup('filename');
pg_start_backup
-----------------
10/FE1E2BAC
(1 row)

Later:
SELECT pg_stop_backup();
pg_stop_backup
----------------
10/FF000000
(1 row)

The resulting *.backup file:

START WAL LOCATION: 10/FE1E2BAC (file 0000000200000010000000FE)
STOP WAL LOCATION: 10/FF000000 (file 0000000200000010000000FF)
CHECKPOINT LOCATION: 10/FE1E2BAC
START TIME: 2008-11-09 01:15:06 CST
LABEL: /bck/db/sn200811090115.tar.gz
STOP TIME: 2008-11-09 01:15:48 CST

In my 8.3.4 instance, WAL file naming occurs as:

...
0000000100000003000000FD
0000000100000003000000FE
000000010000000400000000
000000010000000400000001
...

WAL files never end in 'FF'. This causes a problem when trying to collect
the ending WAL file for backup.

- r.